Compensation and Benefits - Restricted Share Activity (Details) - USD ($)	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Weighted-Average Grant Date Fair Value
PSU outstanding subject only to qualified retirement	80,252	45,000
Potential Class A Shares associated with 2020 PSU grant performance criteria	$ 75,233
Unvested restricted share-based awards
Weighted-Average Grant Date Fair Value
Unvested at beginning of period (in dollars per share)	$ 38.84	$ 39.09	$ 38.18
Granted (in dollars per share)	41.97	34.99	41.86
Forfeited (in dollars per share)	40.26	42.95	40.11
Vested (in dollars per share)	37.56	37.55	34.85
Unvested at end of period (in dollars per share)	$ 39.26	$ 38.84	$ 39.09	$ 38.18
Restricted Stock Awards and Restricted Stock Units
Unvested at beginning of period	5,351,492	5,396,343	5,245,394
Granted in Period, Number of Shares	504,055	517,386	788,703
Forfeited in Period, Number of Shares	(36,022)	(19,750)	(18,671)
Vested in Period, Number of Shares	(543,045)	(542,487)	(619,083)
Unvested at end of period	5,276,480	5,351,492	5,396,343	5,245,394
Unvested restricted share-based awards \| Class A Common Stock
Restricted Stock Awards and Restricted Stock Units
Unvested at end of period	5,166,152
Performance Shares
Weighted-Average Grant Date Fair Value
Unvested at beginning of period (in dollars per share)	$ 54.89	$ 58.13	$ 61.42
Granted (in dollars per share)	0	0	53.50
Forfeited (in dollars per share)	$ 0	0	0
Share-Based Compensation Arrangement By Share-Based Payment Award Shares Adjustments Due To Performance Measures	3
Vested (in dollars per share)	$ 50.52	34.97	0
Unvested at end of period (in dollars per share)	$ 37.86	$ 54.89	$ 58.13	$ 61.42
Restricted Stock Awards and Restricted Stock Units
Unvested at beginning of period	216,170	231,170	135,230
Granted in Period, Number of Shares	0	0	95,940	75,230
Forfeited in Period, Number of Shares	0	0	0
Vested in Period, Number of Shares	(39,981)	(15,000)	0
Unvested at end of period	176,192	216,170	231,170	135,230

PSU outstanding subject only to qualified retirement

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Potential Class A Shares associated with 2020 PSU grant performance criteria

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Share-Based Compensation Arrangement By Share-Based Payment Award Shares Adjustments Due To Performance Measures

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No definition available.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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